From: sumit nagariya <sumit.nagariya@gmail.com>
To: Eric Wong <e@80x24.org>
Cc: unicorn-public@bogomips.org, Hleb Valoshka <375gnu@gmail.com>
Subject: Re: Why Unicorn master process memory increasing
Date: Sun, 6 May 2018 00:30:19 +0530 [thread overview]
Message-ID: <CAC6mmuHFko=e4Cv5mdZwk1zNnuRv21CNkX0po3xwkFho1LmK_g@mail.gmail.com> (raw)
In-Reply-To: <20180419024548.GA20200@dcvr>
Hi Eric,
Sorry for my late response, somehow missed your mail. Just to update I
managed to fix the issue, it was related to GC. We were using
unciron's oob_gc to control gc execution. Although we had correct
configuration for oob_gc but somehow it was not allowing GC to run. I
checked GC stat and found that major & minor GC count is consistent
over the time. I removed oob_gc and now using gctools gem. With
gctools gem master memory is consistent to ~400MB.
Thanks a lot for your help.
Regards,
Sumit
On Thu, Apr 19, 2018 at 8:15 AM, Eric Wong <e@80x24.org> wrote:
> Hleb: remember to reply-all, we will never require subscription
> to post to this list, so it's likely sumit never saw it.
>
> Hleb Valoshka <375gnu@gmail.com> wrote:
>> I believe it's hard to say something without your unicorn configuration file.
>
> sumit: what Hleb asked...
>
> I suspect "preload_app true" in your config is loading something
> in your app which is using up your memory. Sometimes there's
> monitoring threads which might fill a queue up or something.
>
> Anything in error logs? Failing that, strace (on Linux) might
> tell you what's going on at the error level.
>
> But yeah, the master process shouldn't be doing anything besides
> listening to signals and respawning failed workers.
>
> If you want to check if there's monitoring threads on Linux
> systems with /proc mounted, you can see how many threads the
> master has:
>
> ls /proc/$PID_OF_MASTER/task/
>
> There should be two entries for Ruby 1.9-2.5(*), one being the
> master PID and one for the timer-thread. If you have more,
> then that's probably some thread doing stuff in the
> background...
>
> (*) _maybe_ we can get rid of timer-thread for 2.6...
--
Thanks & Regards
Sumit Nagariya
prev parent reply other threads:[~2018-05-05 19:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-11 15:07 Why Unicorn master process memory increasing sumit nagariya
2018-04-12 10:22 ` Hleb Valoshka
2018-04-19 2:45 ` Eric Wong
2018-05-05 19:00 ` sumit nagariya [this message]
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